HYDROLOGY OF NEW YORK 



287 



the elevation of the Susquehanna river at Sidney is somewhat less 

 than 1000 feet. 



Charlotte riro\ This river rises in the western part of Scho- 

 harie county and flows west into the main Susquehanna a few 

 miles east of Oneonta. 



Oak creek. This stream rises in Schuyler lake and flows south, 

 joining- the main Susquehanna three miles south of Otsego lake. 

 Richfield Springs is at the north end of this lake, with an eleva- 

 tion above tide of 1450 feet. 



The streams of the Susquehanna catchment area largely issue 

 from the region of Chemung sandstones and shales. The country 

 is deforested and they are all flashy and uncertain in their flow. 

 While there are no measurements verifying the statement, the 

 writer considers it probable that all. or nearly all of them, have 

 a minimum flow not exceeding 0.1 of a cubic foot per second' per 

 square mile, and several of them, in an extremely dry time, sink 

 to about 0.(15 of a cubic foot per second per square mile. The 

 Hood Hows, on the contrary, are universally large. The valleys 

 ;u the headwaters, as we have seen, usually lie at elevations of 

 from 1 1?<M> to 1100 feet above tide. 



In regard to the following tabulation of the catchment areas of 

 the Susquehanna river and its tributaries in New York, it must 

 l>e stated that they are approximate only. Some of them are 

 from the Report on Water Tower in the Tenth Census, and were 

 taken by planimeter, measurements from French's Map of the 

 State of New York, published in 1860. Undoubtedly when topo- 

 graphic maps of the region are prepared, they will be modified 

 somewhat, but they are the best available at the present time. 



The following are the approximate catchment areas of the 

 Susquehanna and its tributaries in the State of New York: 



Main river below month of Chemung river ( south of Penn- 



Square miles 



sylvania line) 



7,103 

 6,267 

 4,945 



Total area north of Pennsylvania line 



Above mouth of Chemung river 



Below mouth of Chenango river 



